SSH Client Putty, OmNiTTY, PuTTYCS and PuTTY Connection Manager

OmNiTTY - is a curses-based program that allows one to log into several machines simultaneously and interact with them, selectively directing input to individual machines or groups of selected machines.

You can run both line-oriented and screen oriented in the target machines, because Omnitty has built-in terminal emulation capability. When the window is large enough, Omnitty also displays a "summary area" for each machine, in which it shows what the latest output from the machine was, so you can have an idea of what is going on in each machine.

http://omnitty.sourceforge.net/
OmNiTTY - 同步作業的好工具

PuTTYCS - PuTTY Command Sender - is a small windows application that is intended
to be used along with multiple instances of PuTTY
(including PuTTYtel, TuTTY, and PieTTY). It's purpose is
to send the same command to each PuTTY window. It is can
be useful for copying files, starting and stopping processes,
and examining logs on multiple servers.

http://www.millardsoftware.com/puttycs

PuTTY Connection Manager - is a free PuTTY Client Add-on for Windows platforms which goal is to provide a solution for managing multiple PuTTY instances. This is one of the most important missing feature of PuTTY.

http://puttycm.free.fr/cms/